Grounded in Reality?

Looking back, I think I could have done a few things different. For example, I don't really need a separate power-on LED. I could either just not populate it, or rev the schematic a little to make it a software controlled indicator rather than hard linked to the power switch. That change would allow me to put the device to sleep. The PIC18F25K20 draws somewhere around a tenth of a microamp while in sleep mode. That being the case, I might just discard the power switch all together. Otherwise, it's cool.

I could have given each LED its own via to the ground plane too. That's supposed to reduce noise a bit. Although, this will probably never be clocked high enough to make much difference, nor used in an environment where it matters.

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The two chips are similar but not exact. The 25K20 is a 3v part while the 2520 is a 5v part. The 25K20 has one PWM while the 2520 has two. The memory specs are all the same. At DigiKey, the K is less expensive than the other and it comes in the SSOP package that I wanted. The thing about Microchip is that there are so many slight variations that sometimes it's difficult to choose.